In the IaaS market the open source torch has officially been passed from Eucalyptus to OpenStack, a community effort that is showing strong momentum in both vendor participation and end user interest. But now it needs to start showing staying power, and that's just what I expect to see at this week's OpenStack Design Summit in Boston. What started as an effort to leverage the open community to help advance the technologies started by Rackspace and NASA has now turned into a vibrant community advancing IaaS technologies at a rapid pace. What it was lacking up until this summer was solid go-to-market momentum. But now: